allotted to topics related to the economy, healthcare and government. tens of millions of americans will be watching. according to the polls, most have already made up their minds. one recent poll says 7% of likely voters are still undecided. they will be the primary targets tonight. as the neigh watches. chief white house correspondent ed henry begins our coverage. >> in the run township the clash that will help decide whether he gets another four years, president obama stayed mum. leaving the heavy lifting yet again today to former president bill clinton in new hampshire, who made the case this is a choice about the next four years. >> the economy is not fixed. i am telling you, nobody can fix this much damage in four years. but the president's economic plan is better in the short run, better in the long run. >> reporter: the president made the opposite case in 2009. vowing to get the economy fixed in three years or this would be in his words a one-term proposition. which is why senator marco rubio told fox he believes the president will be vulnerable